Submerged exhaust and bilge-water-removing device for motor-boats.



v G.'M. CRAM, SUBMERGED EXHAUSTAND BILGE WATER REMOVING DEVlCE FOR MOTOR BOATS.

' APPUCATION FILED JAN.23. 1915.

1,162,223. I Patented NW. 30, 1915.

witnesses. Inventor:

' cvJLuMnlA PLANOURAFH cO-. WASHINGTON, D. c.

' the noise generally associated with motorj.

water passlng through said casing'wlth the a enonenivr. GRAM, or PORTLAND, MAINE.

SUBMERGED EXHAUST AND IBILGE-WATEB-REMOVING DEVICE FDR MGTOR-BOATS.

To all whom it may concern Be it known that I, GEORG 'M. GRAM, a

citizen of the United States, residing at Portland, in the countyof Cumberland State of Maine, have invented new and useful Improvements in Submerged Exhaust I and Bilge-WVater-Rcmoving Devices for Motor-Boats, of which the following is a specification. I

This invention relates'to improvements in submerged'exhaust and bilge water remov-i ing devices for motorboats, of the class set forth in the U. S. Letters Patent No. 818,951" issued to Herbert N. Goodwin, Apr1l 24,

The object of this invention is to provide a device which is capable of discharging the products of combustion, from theengine of the boat to which the device is at tached, below the, surface of the-water, thus dispensing with the disagreeable odor and boats and at ,thesa me time producing an exhaust which will not create back pressure means for automatically operating thesame and means for positively preventing the operation of said bilge waterremoving means.

Theinvention consists in the combination 7 and arrangement of parts whereby the abo've objects andcertain other objects hereinafter appearing may be-attained, as set forth in thefollowing specification and particularly pointed out in the claims;

Referring to the drawings: Figure 1 isa longitudinal section ofqa device embodying my invention with the same shown. attached to a portion of the bottom of the boat Fig. 2 is a section taken on line 22 of Fig; 1. Fig. 3, is an end view ofthe device as viewed from the lefthand side of. Fig- 1 with the planking ofthe boat to which the device is attached shown insection. Like numerals refer tolikeparts throughout the several views of the drawings.

In the drawings, 5 represents a portion of the planking or'bottom of a vessel and 6 is a casing which is secured to said vessel, preferably by means of bolts 7 passing through a flange 8,which flange surrounds said casing.

The. casing. 6 embodies in its construction pressure inlet chamber or passage 10 and w an outlet chamber 11, which also constitutes Specification of LetterslEatent. I Patented NOV. 30, 1915.

" Application filed January as, 1915. a Serial No.4,053.

a suction inlet chamber for the fluid to be actedupon. The chambers 10 and 11 are partiallyseparated one from the other by a'graduallycontracted or funnel-shaped casing 12, said casing terminating ina reduced open ng or discharge or fice 13 located intermediatethe ends of the casing 6 and com- 1 municating with said suction chamber 11.

The chamber 10 has an inlet orifice 14 directedtoward the bow of the vessel and adapted to direct a stream of fluid, prefer ably water which constitutes the actuating fluid-, through the discharge orifice 13 into the suction chamber 11 as the boat to which the dev'ice'is attached is advanced through After the water has been diswe the water. charged through the orifice 13 into the chamber 11 it passes from the casing 6 and througha discharge orifice 15 directed toward stern of the vessel.

The contracting walls 12 of the inlet chamher 10 greatly increase the velocity of the resultthat a partial vacuum will be formed 7 within the portion of the suction chamber 11 .surroundlng, or in the vicinity of said contracted portion and at this point in said cas-v ing a suction passage 16 is connected there with through an orifice 17 said suction passage 16 being preferably formed within an i upwardly extending ,curved portion 18,

which may be connected in any suitable manner to the exhaust port of the engine. 1 The increasedvelocity of the water passing throughthe orifice-13 and the chamber 11 gives an additional impulse to the exhaust from the engine, which is admitted to the casing 11 through the orifice 17, and finally ejects said exhaust gases beneath the boat, resulting in anin creased eificiency of the motor, due to the absence of any back a pressure from the exhaust thereof.

There is considerable heat contained within the discharge from a combustion engine and as said discharge is admitted to the chamber 11, the water passing therethrough from the orifice 18 is partially heated,which consequently increases the velocity ofsaid .water and incidentally increases the suction within said chamber 11.

a To take advantageof the increase in the suction within the chamber 11, due to the combining of the hot gases which aredischarged from the engine and the actuating fluidpassing therethrough, a second suction passage 19 is provided, whichpassage is connected to said chamber 11 adjacent to the orifice 13, preferably immediately at the rear of the orifice 17 ofthe exhaust passage 16, said passage 19 constituting a bilge water outlet or discharge. The passage 19 isconnected by a pipe 20 to the interior of said boat, thus any water which may collect in the bottom of said boat will be withdrawn therefrom by the suction created by the passage of the fluids through the casing fi.

Itis not necessary that such a suction be constantly maintained; Therefore a valve 21' has been provided in the pipe 20 which may be operated at will to permit 'or prevent the passage of fluid therethrough. The preferred type of valve employed in this connection-is the type known as the rotary valve consisting of a rotary member 22 having a passage 23 extending transversely therethrough, which may be moved to aline with the passage through the pipe 20, or be arranged transversely thereof.

The rotary member 22 is arranged within a cylindrical casing 24 to which the pipe 20 is attached and a cap 25 having screwthreaded engagement with the end of said i l for the purposeof permitting or preventing .the passage of the fluid through the pipe 21 and this valve may be, opened, or closed when the vessel is under way or not.

Should said valve be opened when said vessel is not moving and the engine is not in operation there will be no actuating fluid passing throughthe casing 6 to produce a suction at the mouth of the passage 19 and consequently. the water will backup .into said passage and if permitted so to do the boat would be flooded. To prevent this from happening a check valve 30 is arranged in the passage 19, said check valve preferably being conical and adapt- ,ed to engage a conical seat 31 and thus .close said passage. To guide said valve during its opening and closingmovements. a stem 32 is provided, which stem extends upwardlv from said valve and has sliding enga ement with the valve casing 33 at 34, while a pin 35 is provided. to limit the movements of said valve downwardly toward the chamber 11.

i To facilitate the assembling of the de- I v vice, the valvecasing 33is made separate from the casing butis secured thereto preferably by screw-threads 36'. The operation of the check valve'30 will be automatic, that is to say, when the actuating fluid is passing through the casing 6, in the direction of the arrows a, a suction will be produced in the exhaust passage 16, as indicated by the arrow 6 and also in the passage 19, as indicated by the arrows a. The valve 30 is arranged to open toward the chamber 11. Therefore should the valve 21 be opened, a suction, such as described, will draw said valve 30 inwardly until it strikes the pin 35 and retains said valve open as long as the fluid is passing in the direction of the arrows a, or in other words, a suction is maintained at the mouth of the passage'19, but when said suction is overcome by the pressure of the water against the sides of the vessel and against said valve 30, said valve will be closed and maintained in such closed relation until the action thereagainst is reversed.

Having thus described my invention what I claim and desire by Letters Patent to secure is: 1. In combination a boat, a'casing secured to the bottom of said boat, said casing embodying in its construction a passage extending longitudinally of said boat, saidpassage having an outlet chamber and an inlet chamber, said inlet chamber having'an inlet-orifice directed toward the bow of said boat and a discharge orifice substantially smaller in diameter than saidinlet orifice and communicating with said outlet chamber, said outlet chamber having a suction passage connected therewith in close prox' imity to said discharge orifice and constituting an exhaust passage, said outlet chamher having a second suction passage adjacent to said discharge orifice, saidseconcl passage constituting a bilge water outlet, and a valve arranged in said second spassage adapted to be operated to permit or prevent'the passage of fluid through said second passage.

. 2. In combination a boat, a casing secured to the bottom of said boat, said casing embodving in its construction a passage extending longitudinally of said boat, said passage having an outlet chamber and an inlet chamber, said inlet chamber having an inlet orifice directed toward the bow of said boat and a discharge orifice substantially smaller in diameter than said inlet orifice and communicating with said outlet chamber, said outlet chamberhaving a suction passage connected therewith in close proximity to said discharge orificeand constituting an exhaust passage, said outlet chamber having a second suction passage adjacent to said discharge orifice and at the rear of said exhaust passage, said second passage constituting a bilge water outlet, and a valve arranged in said second passage adapted to be operated to permit or prevent the passage of fluid through said second passage.

8. In combination a boat, an engine arranged within said boat, a casing adapted to be fastened to the bottom of said boat, said casing embodying in its construction a passage extending longitudinally thereof for the actuating fluid, said passage being contracted intermediate its ends, said casing also having a bilge water suction passage connected therewith adjacent to said contracted portion, a valve adapted to close said suction passage, an exhaust pipe connecting said engine with said casing in close proximity to said contracted portion constructed and arranged tounite the exhaust gases from'said engine with the actuating fluid passing through said: casing, said exhaust and said actuating fluid combining V to createasuction through said bilge watersuction passage. y

In testimony whereof I have hereunto set my hand in presence of two subscribing wit- Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). G. 

